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node_modules/vue-loader/lib/template-compiler/modules/transform-require.js 1.13 KB
aaac7fed   liuqimichale   add
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  // vue compiler module for transforming `<tag>:<attribute>` to `require`
  
  const urlToRequire = require('../url-to-require')
  
  const defaultOptions = {
    video: ['src', 'poster'],
    source: 'src',
    img: 'src',
    image: 'xlink:href'
  }
  
  module.exports = userOptions => {
    const options = userOptions
      ? Object.assign({}, defaultOptions, userOptions)
      : defaultOptions
  
    return {
      postTransformNode: node => {
        transform(node, options)
      }
    }
  }
  
  function transform (node, options) {
    for (const tag in options) {
      if ((tag === '*' || node.tag === tag) && node.attrs) {
        const attributes = options[tag]
        if (typeof attributes === 'string') {
          node.attrs.some(attr => rewrite(attr, attributes))
        } else if (Array.isArray(attributes)) {
          attributes.forEach(item => node.attrs.some(attr => rewrite(attr, item)))
        }
      }
    }
  }
  
  function rewrite (attr, name) {
    if (attr.name === name) {
      const value = attr.value
      // only transform static URLs
      if (value.charAt(0) === '"' && value.charAt(value.length - 1) === '"') {
        attr.value = urlToRequire(value.slice(1, -1))
        return true
      }
    }
  }